Subaru Legacy 2002 Service Manual page 1547

Engine (DIAGNOSTICS)
19. General Diagnostic Table
S048257
A: INSPECTION
1. ENGINE
S048257A1001
NOTE:
Malfunction of parts other than those listed is also possible. <Ref. to ME(H6)-76, Engine Trouble in Gen-
eral.>
Symptom
1. Engine stalls during idling.
2. Rough idling
3. Engine does not return to idle.
4. Poor acceleration
GENERAL DIAGNOSTIC TABLE
S048257A10
1) Idle air control solenoid valve
2) Intake manifold pressure sensor
3) Intake air temperature sensor
4) Ignition parts (*1)
5) Engine coolant temperature sensor (*2)
6) Crankshaft position sensor (*3)
7) Camshaft position sensor (*3)
8) Fuel injection parts (*4)
9) EGR valve
1) Idle air control solenoid valve
2) Intake manifold pressure sensor
3) Intake air temperature sensor
4) Engine coolant temperature sensor (*2)
5) Ignition parts (*1)
6) Air intake system (*5)
7) Fuel injection parts (*4)
8) Throttle position sensor
9) Crankshaft position sensor (*3)
10) Camshaft position sensor (*3)
11) Oxygen sensor
12) Fuel pump and fuel pump relay
13) EGR valve
1) Idle air control solenoid valve
2) Engine coolant temperature sensor
3) Accelerator cable (*6)
4) Throttle position sensor
5) Intake manifold pressure sensor
6) Intake air temperature sensor
7) EGR valve
1) Intake manifold pressure sensor
2) Intake air temperature sensor
3) Throttle position sensor
4) Fuel injection parts (*4)
5) Fuel pump and fuel pump relay
6) Engine coolant temperature sensor (*2)
7) Crankshaft position sensor (*3)
8) Camshaft position sensor (*3)
9) A/C switch and A/C cut relay
10) Engine torque control signal circuit
11) Ignition parts (*1)
12) EGR valve
EN(H6)-340
Problem parts